Setting QoS in SMC Router

Hi,
I have 2 PCs connected to the router ( Model is SMC 7904WBRA2 ) via Ethernet, would you plz instruct me how to set QoS to give 95% of bandwidth to first one ( 192.168.2.45 ) and 5% to second one ( 192.168.2.3 ) in all type of traffic.
Thanx in advance.